{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["process characterization", "machine or equipment", "engineering feature", "biomedical", "machanical property", "material"], "input": "A comparison of the air-side heat transfer coefficient of the present polymer heat exchanger with some of the commercially available plain plate fin heat exchanger surfaces suggests that its performance in general is superior to that of common plain plate fin surfaces ."}
{"process characterization": [], "machine or equipment": ["heat exchanger"], "engineering feature": [], "biomedical": [], "machanical property": [], "material": ["polymer"]}